I don't think Cloud/Sephiroth's capability to SFF is going to matter against Link/Ganondorf. Besides they are doing better against Squall than Cloud did in 2k8. You can laugh at four-ways all you want, but at the same time seven year old stats are probably just as bad.
People should be comparing non-SFF performances like Alucard/Dracula vs. Kratos/Zeus
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BOP Results: http://www.freewebs.com/charmander6000/Rivalry%20BOP.xls
Rivalry Rumble: 93/120 Today: Cloud/Sephiroth